aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* H.261 codec
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
* Copyright (c) 2004 Maarten Daniels
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* H.261 codec.
*/
#ifndef AVCODEC_H261_H
#define AVCODEC_H261_H
#include "mpegvideo.h"
#include "rl.h"
/**
* H261Context
*/
typedef struct H261Context {
MpegEncContext s;
int current_mba;
int mba_diff;
int mtype;
int current_mv_x;
int current_mv_y;
int gob_number;
int gob_start_code_skipped; // 1 if gob start code is already read before gob header is read
} H261Context;
#define MB_TYPE_H261_FIL 0x800000
extern uint8_t ff_h261_rl_table_store[2][2 * MAX_RUN + MAX_LEVEL + 3];
extern const uint8_t ff_h261_mba_code[35];
extern const uint8_t ff_h261_mba_bits[35];
extern const uint8_t ff_h261_mtype_code[10];
extern const uint8_t ff_h261_mtype_bits[10];
extern const int ff_h261_mtype_map[10];
extern const uint8_t ff_h261_mv_tab[17][2];
extern const uint8_t ff_h261_cbp_tab[63][2];
extern RLTable ff_h261_rl_tcoeff;
void ff_h261_loop_filter(MpegEncContext *s);
void ff_h261_common_init(void);
int ff_h261_get_picture_format(int width, int height);
void ff_h261_reorder_mb_index(MpegEncContext *s);
void ff_h261_encode_mb(MpegEncContext *s, int16_t block[6][64],
int motion_x, int motion_y);
void ff_h261_encode_picture_header(MpegEncContext *s, int picture_number);
void ff_h261_encode_init(MpegEncContext *s);
#endif /* AVCODEC_H261_H */
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